Объяснение:
(x-y)*(x²+xy+y²)=x³+x²y+xy²-x²y-xy²-y³=x³-y³.
(x+y)*(x²-xy+y²)=x³-x²y+xy²+x²y-xy²+y³=x³+y³.
Объяснение:
(x-y)*(x²+xy+y²)=x³+x²y+xy²-x²y-xy²-y³=x³-y³.
(x+y)*(x²-xy+y²)=x³-x²y+xy²+x²y-xy²+y³=x³+y³.